Protozoan cysts are
A. necessary for transmission to a new host.
B. part of all protozoan life cycles.
C. the primary form of replication.
D. analogous to bacterial endospores.
E. are produced by binary fission.
Answer: D
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Male Jarrow’s spiny lizards ordinarily exhibit strong territoriality only during the ____ mating season, when elevated
blood levels of ____ stimulate their aggressive behavior.
a. summer; estrogen b. summer; testosterone c. autumn; octopamine d. autumn; estrogen e. autumn; testosterone
The largest human autosome is chromosome ________ and the smallest is chromosome ________
A) 1, 22 B) 1, 21 C) 1, Y D) X, 22 E) None of these
Vertical evolution, whereby living organisms evolve from a common ancestor ("tree of life"), is the only mechanism of evolution on Earth.
Answer the following statement true (T) or false (F)
When evolutionary biologists study the process of natural selection they focus on:
a. what drives mutations. b. how some trait of interest changes over time. c. how some trait of interest remains constant over time. d. A and B. e. B and C.